Highest salary at Delta County in year 2020 was $152,201. Number of employees at Delta County in year 2020 was 142. Average annual salary was $46,654 and median salary was $47,996. Delta County average salary is the same as USA average and median salary is 10 percent higher than USA median salary. From 2019 to 2020, the average salary of employees at this employer increased 16.4 percent, the median salary increased 18.9 percent.